The Collaborative International Dictionary of English v.0.48:

Heal \Heal\ (h[=e]l), v. i.
   To grow sound; to return to a sound state; as, the limb
   heals, or the wound heals; -- sometimes with up or over; as,
   it will heal up, or over.
   [1913 Webster]

         Those wounds heal ill that men do give themselves.
                                                  --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Heal \Heal\ (h[=e]l), v. t. [See Hele.]
   To cover, as a roof, with tiles, slate, lead, or the like.
   [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Heal \Heal\, n. [AS. h[=ae]lu, h[=ae]l. See Heal, v. t.]
   Health. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Heal \Heal\, v. t. [imp. & p. p. Healed (h[=e]ld); p. pr. &
   vb. n. Healing.] [OE. helen, h[ae]len, AS. h[=ae]lan, fr.
   h[=a]l hale, sound, whole; akin to OS. h[=e]lian, D. heelen,
   G. heilen, Goth. hailjan. See Whole.]
   1. To make hale, sound, or whole; to cure of a disease,
      wound, or other derangement; to restore to soundness or
      health.
      [1913 Webster]

            Speak the word only, and my servant shall be healed.
                                                  --Matt. viii.
                                                  8.
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   2. To remove or subdue; to cause to pass away; to cure; --
      said of a disease or a wound.
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            I will heal their backsliding.        --Hos. xiv. 4.
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   3. To restore to original purity or integrity.
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            Thus saith the Lord, I have healed these waters. --2
                                                  Kings ii. 21.
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   4. To reconcile, as a breach or difference; to make whole; to
      free from guilt; as, to heal dissensions.
      [1913 Webster]

WordNet (r) 3.0 (2006):

heal
    v 1: heal or recover; "My broken leg is mending" [syn: mend,
         heal]
    2: get healthy again; "The wound is healing slowly"
    3: provide a cure for, make healthy again; "The treatment cured
       the boy's acne"; "The quack pretended to heal patients but
       never managed to" [syn: bring around, cure, heal]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "heal":
   bandage, bathe, bring around, bring round, care for, cicatrize,
   close up, cure, diagnose, doctor, flux, give care to, granulate,
   heal over, improve, knit, massage, mend, minister to, nurse,
   operate on, patch up, physic, plaster, poultice, pull round, purge,
   reconcile, recover, recuperate, recure, rejuvenate, remedy, renew,
   repair, restore, restore to health, revitalize, right itself, rub,
   scab over, set, settle, splint, strap, treat, work a cure